The Terrain Is Everything; The Germ Is

Men Who Have Excessive Faith In Their Theories ... Make Poor Observations, Because They Choose Among The Results Of Their Experiments Only What Suits Their Object, Neglecting Whatever Is Unrelated To It And Carefully Setting Aside Everything Which Might Tend Toward The Idea They Wish To Combat

The Doubter Is A True Man Of Science: He Doubts Only Himself And His Interpretations, But He Believes In Science.

Those Who Do Not Know The Torment Of The Unknown Cannot Have The Joy Of Discovery.

When Entering On New Ground We Must Not Be Afraid To Express Even Risky Ideas So As To Stimulate Research In All Directions. As Priestley Put It, We Must Not Remain Inactive Through False Modesty Based On Fear Of Being Mistaken.

In Science, The Best Precept Is To Alter And Exchange Our Ideas As Fast As Science Moves Ahead.